I simply know I play better when playing the real thing. How about you?

I know, when playing the B3's waterfall keys, or the slightly stiff Rhodes action, or the quick, short throw Clavinet keys, that the way the keys feel, how they work, affects what I play. All keybeds are NOT created equal! Each of them shapes what you play, to an extent.

You CAN play the exact same thing on the exact same keyboard for each sound, but the the keybed itself doesn't help shape things. That has to come solely from you...

I know that theoretically I SHOULD be able to play exactly the same on my arranger or a Rhodes, but in real life, it simply doesn't work out that way. Making music is a two way street. You play the instrument, but to a small extent, the instrument plays YOU, too!
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An arranger is just a tool. What matters is what you build with it..!